Refactor Marlin2 component and add new features

- Updated __init__.py to include max_sd_files configuration option.
- Refactored Marlin2 class to use new namespaces and improved structure.
- Added support for binary sensors and select components in binary_sensor.py and select.py.
- Enhanced sensor.py and text_sensor.py to include new configuration options for SD card file count and selected file.
- Improved code readability and organization across multiple files.

sensor.py

@@ -1,21 +1,12 @@
 import esphome.codegen as cg
 import esphome.config_validation as cv
-from esphome import automation
-from esphome.components import uart
 from esphome.components import sensor
-# from esphome.components import text_sensor
 from esphome.const import (
-    CONF_ID, 
-    CONF_INDEX, 
-    CONF_SENSORS, 
-    CONF_HUMIDITY, 
-    CONF_MODEL, 
-    CONF_PIN, 
-    CONF_TEMPERATURE, 
-    UNIT_CELSIUS, 
-    UNIT_PERCENT, 
-    UNIT_SECOND, 
-    STATE_CLASS_MEASUREMENT, 
+    CONF_ID,
+    UNIT_CELSIUS,
+    UNIT_PERCENT,
+    UNIT_SECOND,
+    STATE_CLASS_MEASUREMENT,
     DEVICE_CLASS_TEMPERATURE,
     DEVICE_CLASS_DURATION,
 )
@@ -30,9 +21,10 @@ CONF_EXT_SET_TEMPERATURE = "ext_set_temperature"
 CONF_PRINT_PROGRESS = "print_progress"
 CONF_PRINT_TIME = "print_time"
 CONF_PRINT_TIME_REMAINING = "print_time_remaining"
+CONF_SD_CARD_FILE_COUNT = "sd_card_file_count"
 
 CONF_MARLIN = "marlin2"
-CONFIG_SCHEMA =  cv.Schema(
+CONFIG_SCHEMA = cv.Schema(
     {
         cv.GenerateID(CONF_MARLIN): cv.use_id(Marlin2),
         cv.Optional(CONF_BED_TEMPERATURE): sensor.sensor_schema(
@@ -76,13 +68,26 @@ CONFIG_SCHEMA =  cv.Schema(
             device_class=DEVICE_CLASS_DURATION,
             state_class=STATE_CLASS_MEASUREMENT,
         ),
+        cv.Optional(CONF_SD_CARD_FILE_COUNT): sensor.sensor_schema(
+            accuracy_decimals=0,
+            state_class=STATE_CLASS_MEASUREMENT,
+        ),
     }
 ).extend(cv.polling_component_schema("15s"))
 
 async def to_code(config):
     server = await cg.get_variable(config[CONF_MARLIN])
 
-    for sName in [CONF_BED_TEMPERATURE, CONF_BED_SET_TEMPERATURE, CONF_EXT_TEMPERATURE, CONF_EXT_SET_TEMPERATURE, CONF_PRINT_PROGRESS, CONF_PRINT_TIME, CONF_PRINT_TIME_REMAINING]:
+    for sName in [
+        CONF_BED_TEMPERATURE,
+        CONF_BED_SET_TEMPERATURE,
+        CONF_EXT_TEMPERATURE,
+        CONF_EXT_SET_TEMPERATURE,
+        CONF_PRINT_PROGRESS,
+        CONF_PRINT_TIME,
+        CONF_PRINT_TIME_REMAINING,
+        CONF_SD_CARD_FILE_COUNT,
+    ]:
         if sName in config:
             sens = await sensor.new_sensor(config[sName])
-            cg.add(server.add_sensor(sName,sens))
+            cg.add(server.add_sensor(sName, sens))